AIM: To evaluate root canal deviation during instrumentation of curved root canals.
目的：定量研究弯曲根管预备过程中根管的偏移。
Conclusion the combined application of sonic and hand file instrumentation was conduced to improve the effect of root canal preparation.
结论声波器械和手用器械的联合应用，有助于提高根管预备的效果。
The incidence of canal complication is higher in curved root canal than in straight one during the instrumentation.
在清理和成形过程中弯曲根管比直根管易于产生各种并发症。本研究用不同的根管器械和预备技术预备弯曲根管。
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